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The DU144 Automatic Bypass Valve controls the flow of water through a bypass circuit which is installed between flow and return pipework, typically at or near the boiler.
The L641 is a water temperature thermostat designed for surface mounting on domestic hot water cylinders, it is supplied complete with mounting strap for rapid and easy installation, so draining of the system or tapping the cylinder is not necessary.
The DU144 Automatic Bypass Valve controls the flow of water through a bypass circuit which is installed between flow and return pipework, typically at or near the boiler.
The L641 is a water temperature thermostat designed for surface mounting on domestic hot water cylinders, it is supplied complete with mounting strap for rapid and easy installation, so draining of the system or tapping the cylinder is not necessary.